This thread made me want to finish my spot welder, that has been lying around in pieces for years now.
Because of the size of the wire and the available space in the transformer, I cant get more than 3.6 Volts on the secondary side.
Now I can just barely weld two pieces of .012" steel together (0.3mm), Ideally I want to be able to weld two .025" together.

To those of you that have a sucessful setup: How much secondary voltage do you have, and how thick can you weld?


Regards

Lars